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10 extremely unusual allergies

By: WomansDay .com on Feb. 21, 2011, 4:47 p.m.
shower head

Photo: stevendepolo/Flickr

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It seems like the most innocuous substance around, but believe it or not, some people are actually allergic to water. Aquagenic urticaria is a rare condition in which water of any temperature causes intensely itchy and painful hives on the skin. An effective treatment hasn't been found, making regular activities — like showering and swimming — extremely difficult.